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- The application of elevated fully mechanized caving mining technology is an economical and efficient means for an old coal mine with an exploitation history of 38 years. 应用高位综放工艺回采煤柱资源对于已有38年开采历史的老矿来说是一种经济、高效的手段。
- working face of an old coal mine 老矿井采区
- A Design to Raise Supply Voltage at the Working Face of an Old Coal Mine 老矿井采区供电电压提高方案
- They are ventilating the sap of a coal mine. 他们正在使煤矿坑道通风。
- That coal mine is no longer worked. 那个煤矿已经不经营了。
- This old coal face is to be reworked next week. 这个旧的采煤工作面下周将重新开采。
- Application of Integrated Geophysical Exploration to the Investigation for the Mined-out Areas of Old Coal Mine and the Water-bearing Zones 综合物探方法在煤矿采空区及其含水性勘察中的应用
- They are trying their best to reactivate the old coal cutter. 他们正在尽最大的努力使这台旧截煤机重新运转。
- They underwrote the coal mine's bonds. 他们同意买下该煤矿的未认购的股票。
- There is a coal mine near my home town. 我的家乡附近有一个煤矿。
- Near Newport,there are old coal mines.They make steel there. 靠近港口，那里有很多旧的煤矿场制造钢铁。
- We decided to open out a coal mine near the city. 我们决定在城市附近开发一煤矿。
- The coal mine was closed down due to exhaustion. 这煤矿因矿源枯竭而关闭了。
- They are developing a new coal mine. 他们在开发新煤矿。
- They sold the coal mine at a profit. 他们把煤矿卖掉赚了钱。
- China Geological Coal Mine Corp. 中国地方煤矿总公司。
- Coal Gas Factory of Datong Coal Mine Gro. 大同煤矿集团有限责任公司煤气厂。
- A passage or gallery in a coal mine. 通道煤矿中的通道或水平巷道
- My grandfather used to work in a coal mine. 我祖父曾在煤矿工作过。
- Liu township coal mine enterprises. 乡镇企业有刘沟煤矿。
